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- W4367190817 abstract "We demonstrate strong dispersive coupling between a fluxonium superconducting qubit and a 690 megahertz mechanical oscillator, extending the reach of circuit quantum acousto-dynamics (cQAD) experiments into a new range of frequencies. We have engineered a qubit-phonon coupling rate of $gapprox2pitimes14~text{MHz}$, and achieved a dispersive interaction that exceeds the decoherence rates of both systems while the qubit and mechanics are highly nonresonant ($Delta/ggtrsim10$). Leveraging this strong coupling, we perform phonon number-resolved measurements of the mechanical resonator and investigate its dissipation and dephasing properties. Our results demonstrate the potential for fluxonium-based hybrid quantum systems, and a path for developing new quantum sensing and information processing schemes with phonons at frequencies below 700 MHz to significantly expand the toolbox of cQAD." @default.
- W4367190817 created "2023-04-28" @default.
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- W4367190817 date "2023-04-26" @default.
- W4367190817 modified "2023-10-14" @default.
- W4367190817 title "Strong dispersive coupling between a mechanical resonator and a fluxonium superconducting qubit" @default.
- W4367190817 doi "https://doi.org/10.48550/arxiv.2304.13589" @default.
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